19428464 has 40 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 8676800.

The previous prime is 19428457. The next prime is 19428473. The reversal of 19428464 is 46482491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9449 + ... + 11319.

It is an arithmetic number, because the mean of its divisors is an integer number (1044576).

Almost surely, 2^19428464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19428464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20891520).

19428464 is an abundant number, since it is smaller than the sum of its proper divisors (22354576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19428464 is a wasteful number, since it uses less digits than its factorization.

19428464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1943 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 19428464 is about 4407.7731339079. The cubic root of 19428464 is about 268.8310875562.

The spelling of 19428464 in words is "nineteen million, four hundred twenty-eight thousand, four hundred sixty-four".